Chaos in pulsar spin dynamics

Berc Deruni*, Mustafa Dogan

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review


In the present paper, a new model describing neutron star dynamics is analysed. The system under consideration can be described as a modified vortex creep model. Two component model and the vortex creep model have been used successfully to describe post glitch relaxation phase. However, glitch behaviour is yet to be explained. There can be a possible stochastic mechanism that trigger glitches in neutron stars. To this aim, we propose a modification in the nonlinear vortex creep model. The significance of the modification is twofold, the dynamics of the system is able to generate intermittency, imitating the glitch behaviour of pulsars, and the system also show chaotic motion when the system parameters are set accordingly. The chaotic dynamics is verified by using nonlinear tools such as numerical phase portraits, Lyapunov exponents and bifurcation diagrams.

Original languageEnglish
Pages (from-to)199-203
Number of pages5
Issue number1
Publication statusPublished - 1 Jan 2023
Event12th IFAC Symposium on Nonlinear Control Systems, NOLCOS 2022 - Canberra, Australia
Duration: 4 Jan 20236 Jan 2023

Bibliographical note

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Copyright © 2023 The Authors.


  • chaos
  • intermittency
  • nonlinear superfluidity
  • Pulsar spin dynamics


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